US4147555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Size compositions for glass fiber reinforced cementitious products
Assignee: Owens Corning
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Filing: 1977-04-21
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Granted: 1979-04-03
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Expires: 1997-04-21
Abstract
Abstract Acrylate-vinyl acetate copolymer size compositions for glass fiber reinforced cementitious products are disclosed. These size compositions show strong improvements in all phases of strand integrity with improved run-out performance in chopping.
Inventors
- 👤 Eleanor B. Cohen
- 👤 William N. Stassen
- 👤 James C. Wintgens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:48
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025; C03C25/103; C03C13/00; C03C13/001; C03C13/002; C03C25/24; C03C25/26; C03C25/28; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2962
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A glass fiber strand comprising: a plurality of glass filaments that are coated at forming with an aqueous emulsion of an unplasticized film former comprising a copolymer of from 70 to 80% vinyl acetate and 20 to 30% of an acrylate ester whose ester portion contains an alkyl radical of from 2 to 8 carbon atoms, said film former comprising between 1.4 and 2.5 weight percent of the total dry strand weight, and said coated fibers being drawn together into a strand and dried, and whereby the fibers of the strand are bonded together with a high degree of strand integrity that is preserved when the strand is chopped.
Claim 2
Dependent Claim
109 words
A glass fiber strand comprising: a plurality of glass filaments that are coated at forming with an aqueous emulsion of an unplasticized film former comprising a copolymer of from 70 to 80% vinyl acetate and 20 to 30% of an acrylate ester whose ester portion contains an alkyl radical of from 2 to 8 carbon atoms, said film former comprising between 1.4 and 2.5 weight percent of the total dry strand weight, and said coated fibers being drawn together into a strand and dried, and whereby the fibers of the strand are bonded together with a high degree of strand integrity that is preserved when the strand is chopped.
Claim 3
Dependent Claim
43 words
A coiled package of the strand of claim 1 wherein the strand when coated with the aqueous emulsion is coiled into a package before drying, and following which the coils of strand can be separated from each other without disruption of the strand.
Claim 4
Dependent Claim
21 words
The strand of claim 2 uncoiled from the package and chopped into lengths between approximately 1/4 inch and approximately 2 inches.
Claim 5
Dependent Claim
17 words
A cementitious material having a high alkali content and reinforced by the chopped strand of claim 3.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |